package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

@Slf4j
@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public void save(EmployeeDTO dto) {
        log.info("EmployeeServiceImpl===线程id: {}", Thread.currentThread().getId());
        Employee employee = new Employee();
        // 拷贝属性值--将dto中的属性值拷贝给employee
        BeanUtils.copyProperties(dto, employee);

        // 1.补充属性字段值, 设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);  //设置默认状态为启用

        // 优化：下面的基础字段交由公共字段字段填充功能实现
        // employee.setCreateTime(LocalDateTime.now());
        // employee.setUpdateTime(LocalDateTime.now());
        // 登录人id从何来？--->解析令牌获取登录人id--->通过ThreadLocal获取登录人id
        // Long empId = BaseContext.getCurrentId();
        // employee.setCreateUser(empId);
        // employee.setUpdateUser(empId);
        // 使用完ThreadLocal，可以将值删除掉，防止内存泄露
        // BaseContext.removeCurrentId();

        // 2.调用mapper插入数据
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询--使用分页插件实现
     *
     * @param dto
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO dto) {
        // 1.设置分页参数
        PageHelper.startPage(dto.getPage(), dto.getPageSize());

        // 2.调用mapper分页查询
        Page<Employee> page = employeeMapper.pageQuery(dto.getName());

        // 3.封装PageResult对象，并返回
        PageResult pageResult = new PageResult(page.getTotal(), page.getResult());
        return pageResult;
    }

    /**
     * 员工启用禁用
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        // 1.构造员工对象
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                // .updateTime(LocalDateTime.now())
                // .updateUser(BaseContext.getCurrentId())
                .build();
        // 2.调用mapper修改员工状态
        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工
     *
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        return employeeMapper.getById(id);
    }

    /**
     * 修改员工
     *
     * @param dto
     */
    @Override
    public void update(EmployeeDTO dto) {
        // 1.构造Employee对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(dto, employee);

        // 2.补充属性字段值：更新时间和更新人
        // employee.setUpdateTime(LocalDateTime.now());
        // employee.setUpdateUser(BaseContext.getCurrentId());

        // 3.调用mapper更新方法
        employeeMapper.update(employee);
    }

}
